1 /* A more useful interface to strtol.
2 
3    Copyright (C) 1995-1996, 1998-1999, 2001-2004, 2006-2018 Free Software
4    Foundation, Inc.
5 
6    This program is free software: you can redistribute it and/or modify
7    it under the terms of the GNU General Public License as published by
8    the Free Software Foundation; either version 3 of the License, or
9    (at your option) any later version.
10 
11    This program is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15 
16    You should have received a copy of the GNU General Public License
17    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
18 
19 #include <config.h>
20 #include "xstrtol.h"
21 
22 #include <stdlib.h>
23 
24 #include "error.h"
25 #include "exitfail.h"
26 #include "gettext.h"
27 
28 #define N_(msgid) msgid
29 
30 /* Report an error for an invalid integer in an option argument.
31 
32    ERR is the error code returned by one of the xstrto* functions.
33 
34    Use OPT_IDX to decide whether to print the short option string "C"
35    or "-C" or a long option string derived from LONG_OPTION.  OPT_IDX
36    is -2 if the short option "C" was used, without any leading "-"; it
37    is -1 if the short option "-C" was used; otherwise it is an index
38    into LONG_OPTIONS, which should have a name preceded by two '-'
39    characters.
40 
41    ARG is the option-argument containing the integer.
42 
43    After reporting an error, exit with status EXIT_STATUS if it is
44    nonzero.  */
45 
46 static void
xstrtol_error(enum strtol_error err,int opt_idx,char c,struct option const * long_options,char const * arg,int exit_status)47 xstrtol_error (enum strtol_error err,
48                int opt_idx, char c, struct option const *long_options,
49                char const *arg,
50                int exit_status)
51 {
52   char const *hyphens = "--";
53   char const *msgid;
54   char const *option;
55   char option_buffer[2];
56 
57   switch (err)
58     {
59     default:
60       abort ();
61 
62     case LONGINT_INVALID:
63       msgid = N_("invalid %s%s argument '%s'");
64       break;
65 
66     case LONGINT_INVALID_SUFFIX_CHAR:
67     case LONGINT_INVALID_SUFFIX_CHAR_WITH_OVERFLOW:
68       msgid = N_("invalid suffix in %s%s argument '%s'");
69       break;
70 
71     case LONGINT_OVERFLOW:
72       msgid = N_("%s%s argument '%s' too large");
73       break;
74     }
75 
76   if (opt_idx < 0)
77     {
78       hyphens -= opt_idx;
79       option_buffer[0] = c;
80       option_buffer[1] = '\0';
81       option = option_buffer;
82     }
83   else
84     option = long_options[opt_idx].name;
85 
86   error (exit_status, 0, gettext (msgid), hyphens, option, arg);
87 }
88 
89 /* Like xstrtol_error, except exit with a failure status.  */
90 
91 void
xstrtol_fatal(enum strtol_error err,int opt_idx,char c,struct option const * long_options,char const * arg)92 xstrtol_fatal (enum strtol_error err,
93                int opt_idx, char c, struct option const *long_options,
94                char const *arg)
95 {
96   xstrtol_error (err, opt_idx, c, long_options, arg, exit_failure);
97   abort ();
98 }
99